60687139 has 2 divisors, whose sum is σ = 60687140. Its totient is φ = 60687138.

The previous prime is 60687091. The next prime is 60687149. The reversal of 60687139 is 93178606.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60687139 is a prime.

It is not a weakly prime, because it can be changed into another prime (60687149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30343569 + 30343570.

It is an arithmetic number, because the mean of its divisors is an integer number (30343570).

Almost surely, 2^60687139 is an apocalyptic number.

60687139 is a deficient number, since it is larger than the sum of its proper divisors (1).

60687139 is an equidigital number, since it uses as much as digits as its factorization.

60687139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 60687139 is about 7790.1950553244. The cubic root of 60687139 is about 392.9755718640.

The spelling of 60687139 in words is "sixty million, six hundred eighty-seven thousand, one hundred thirty-nine".